Make a payload-free package containing a script to install Rosetta 2.
If you have munkipkg installed and available at /usr/local/bin/munkipkg, use make to make an unsigned payload-free package.
If you have sign_pkg.py available at ../jamf-upload/sign_pkg.py, use make; make sign to make a signed package.
You can add this script or package to a policy that is scoped to all computers, because the script will do nothing if Rosetta is already installed, or when run on an Intel device.
It is recommended to target at Enrollment Complete and Recurring Check-in, Once per Computer.
Use a Policy name that will be alphabetically first in your Jamf instance. We use 0001 - Install Rosetta 2.